19. RNA

Question 1

pyrimidine component of RNA

Answer 1

Cytosine

Uracil

Question 2

sugar of RNA

Answer 2

ribose

Question 3

Chargaff’s rule on RNA

Answer 3

Does not apply

Question 4

Which is more stable?

a. DNA
b. RNA

Answer 4

a. DNA

cannot be hydrolyzed by alkali due to absence of 2’ OH group

Question 5

RNA can be hydrolyzed by alkali to

Answer 5

2’,3’-cyclic diesters of the mononucleotides

Question 6

copies genetic information from DNA and serves as template for protein synthesis

Answer 6

mRNA

Question 7

contribute to the formation and fx of ribosomes,which act as site of protein synthesis

Answer 7

rRNA

Question 8

adapter molecules that translate the nucleotide sequence of mRBA into specific amino acids

Answer 8

tRNA

Question 9

contains the anticodon

Answer 9

tRNA

Question 10

cloverleaf appearance in 2D

Answer 10

tRNA

Question 11

this RNA is involved in rRNA and mRNA processing and gene regulation
(e.g. removal of introns)

Answer 11

sRNA

Question 12

these small noncoding regulatory RNA termed ___ and ____ inhibit gene expression

Answer 12

micro-RNA (miRNA)
silencing RNA (siRNA)